Which species concept distinguishes two species by the degree of genetic exchange between their gene pools?
a. Ecological
b. Morphological
c. Phylogenetic
d. Biological
e. All of the listed responses are correct.
Answer: d. Biological
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The core of an intestinal microvillus is composed of a tight bundle of ________
Fill in the blank with correct word.
The change in one population driven by a change in an associated population is called
A) assortative evolution. B) genetic drift. C) coevolution. D) random mutation. E) fitness.
A medical researcher is trying to develop a diagnostic technique for a disease that is characterized by replication of a particular chromosomal region. What would be the most appropriate technique?
A. white blood cell count B. FISH C. gene chip D. genome sequencing
Which of the following antimicrobials does not match its potential shortcomings?
A) Macrolides: This narrow-spectrum drug must be administered parenterally. B) Phenicols: Has a narrow therapeutic index and is associated with bone marrow toxicity that results in aplastic anemia. C) Tetracyclines: Induce photosensitivity, causes detrimental effects on bones and teeth in children younger than 8 years old, and are associated with an increased risk of Clostridium difficile infection D) Aminoglycosides: Are known to cause irreversible hearing loss when administered other than topically. E) Lincosoamides: One common lincosoamide is associated with pseudomembranous colitis caused by Clostridium difficile.